Lubricating means for sewing-machines.



J. M. MERROW.

LUBRICATING MEANS FOR SEWING MACHINES.

APPLICATION EILED MAv|9.1915. v

1 ,21 7,976. Patented Mar. 6, 1917:

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JOSEPH MERROW, 0F HARTFORD, CONNECTICUT, ASSIGFNOR TO THE MERROW MACHINE COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION 0F CON- NECTICUT.

LUBRICATING MEANS FOR SEWING-MACHINES. i

Specification of.Letters Patent; Patented lvlar. 6, 1917.

Application filed May 19, 19.15. semina. l2mal.

To all whom t may concern:

Be it known that I, JOSEPH M. MERRow, a citizen of the United States, residing in the city of Hartford, county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Lubricating Means for Sewing-Machines; and I do de- Clare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings,

- forming a part of this specification, and

to the characters of reference thereon.

This invention relates to lubricating means for sewing machines. Certain machines of this class are characterized by looper .mechanism, of which, as is'well lmown in this art, extremely high speeds are required. In the operation of such machines, increased eliiciency naturally obtains by supplying continuously, adequate lubrication, directly to the relatively movable surfaces which are subjected to the greatest amount of frictional resistance. The provision of novel devices for carrying into eifect this'desideratum is one object of the present invention.

A design typical of the n Merrow overseaming machine such as that illustrated in application for .U. S. patent Serial No. 876,917, filed December 12, 1914, includes in its make-up aremovable frame cap upon which is movably mounted looper mechanism such as that of which. mention has been made above. -It is a further object of the present invention to make provision in said frame cap for a lubricant reservoir with ducts and leaders associated therewith in such a manner that said frame cap together with the looper mechanism and Aits complete lubricating system may be assembled independently of the rest of the machine, and removed from the machine as an entirety to permit inspection and adjustment 'of the parts sustained thereby.

Other objects of the inventionkwill hereinafter appear'. Y

To clearly illustrate one form of embodiment of the invention the accompanying drawings are pro-vided in which Figure 1 is a front view in elevation of a Merrow overseaming machine equipped with the devices which comprise the present improvements.

Fig.Y 2 is an inner face view of a removable frame cap of the machine shown in Fig. 1.

Fig. 3 is a sectional view on line 3-3 of Fig. 2. y

Fig. 4 is a detail view in perspective hereinafter more fully described, and

Fig. 5 is a sectional detail view.

Similar characters of 'reference desig-.

nate corresponding parts throughout the several .views of the drawings, which it will' be noted are drawn to different scales.

Referring to said-'drawings the numeral 2 designates the frame of the machine, 3 the head, 4 the vpresserfoot and 5 the needle plate or work plate. An eye pointed needle 6, operable to move in a path extending above and below the needle plate 5, coperates with the loopers 7 and 8 which are operatively supported on the frame v'cap 9, all as will hereinafterbe more fully described. Said frame -cap 9, which is secured to the machine frame at top and bottom by the screws 10, forms'for an opening or cavity 11 in the machine frame, a closure or cover plate. Cam cylinders 12`and 13 housed within the cavity 11 are secured respectively` to the shafts 14 and 15, the former shaft extending through to the rear of the machine frame where it is provided with a combined hand wheel and driving pulley 16. Intermeshing gears 17 and 18 are associated withthe respective cam cylinders 12 and13 soV that when the pulley 16 is rotated the shafts 14 and 1 5 will together' with said cam cylinders rotate in unison.

The function of these cam cylinders 1s to actuate the loopers-7 and 8 and a driving relation between the cylinders and said loopers may be vestablished in a manner whichv will now be described. The lower caml cylinder 12, is .provided with two cam grooves 19 and 20 while the upper cam cylinder 13 1s provided with a cam 'groove.21. Extending respectively from oppositelyV disposed A 8 may be 'suitably :moved in as manner well known to those familiar with this art, to cooperate with each other and with the needle G, the latter being driven in any convenient way as from the shaft 15, through the parts indicated in a general way by rlhe peculiar motion imparted to the looper carrier 24 by the correlated cam grooves 19 and 2l is accommodated preterably by providing a movable support :tor said carrier. This support may vary as to character, as shown, .it comprises a slide or block 33 mounted tor reciinocatory movement on the inner it'ace oft the trame cap 9 between guides 34 and the latter guide being movable to ltake-lu; wea-r and backed up by an adjusting wedge 3b which bears again-st the shoulder oitl said Ytrame cap 9. ln addition to the bodily movement of looper carrier 24 permitted by the slide provision is also made "for an oscillatory movement thereof, involving a pivotal connection comprising, as shown, a trunnion 38, projecting from said carrier 24, intermediate the oppositely disposed arms there-` of, and journaled in said block 33. ln order to retain the carrier 24 in its proper Apivotal relation to the supporting` block 33 and vto provide additional support for said carrier, a guide bar 39 is mounted on the-'frame cap with a bearing surface 40 effectively positione'd Jfor the purposes stated. Said guide bar is provided at one end with an oiset foot 4l countersunk to receive a screw 42 tapped into the frame cap, while at its opposite end said bar has a foot block 43 eX- tending betweenthe guides 34 and 35, which block is bored to receive a screw 43l countersunk in the front or outer face of the frame cap, and tapped -into the bar proper.

The movement required of the lower loo-per 8 is an oscillatory one,by reason of which the looper carrier 29 may have a simple pivotal support. Such a support is provided in the taper stud 44 which is tapped into the frame -Cap and furnished with a` securing nut 45. l

The embodiment of the present invention withiny and applied to the devices herein above gene ally described will now ybe pointed out and explained.

In the upper part of the iframe cap 9 which is somewhat enlarged for the purpose is `provided a lubricant reservoir comprisin in the present case apair of drilled holes 46 and 47plugged at the entering ends thereof and connected by a duct or ducts as 48. Below the reservoir proper are provided two packing cavities as 49 and 5() connected with the reservoir respectively by ducts as 5l and 52. The packing cavity 49, for ned in the frame cap 9 is plugged at the entering end, and provided with a delivery duct 53 leading to the inclined face 54 of a fin or plate 55 suitably secured to'the'frame cap. The packing cavity 50 is formed in the guide bar 39 and is provided with a delivery duct 56 leading to the inclined face 57 of a lin or plate 58 suitably secured to said guide bar.

lt will be noted that a part of the duct comprises a hole drilled through from the front face of the iframe cap, said hole extending through the toot block 43, and into the bar 39 to the packing cavity 50. rl`he outer end of the hole is plugged by the screw 52. As will have been ini'erredth'e Vpacking cavities -l-9 and 50 are lille-d with some material. as iel't to Vretard the `liow of 'lubricant there-- tln'ough. By varying 4the density olE such packing material the 'llow ol lubricant may be regulated to any rate desirable.

'Referring to Fig'. 2 'it will be noted that the 'lin 55 has a depending point (il) adjacent to the path traversed bythe looper carrier arm 23 which supports the stud QG and roll 23. In the tace of arm opposite the abutting end oiiroll 28 are formed the poehm ets Gl and G2' which open 'laterally on the opposite sides respectively of a portion (33 which may be termed a dellector, of arm 23 which is `of sufficient extentto justv clear the point 6() as said arm 9.3 moves in its reciprocatory path. Lubricant passing onto the lin 55 collects at the point 60 so that a'quantity thereof is alternatelywiped into the pockets 5l and 62 by the opposed edges of the de- Hector 63 as it passes back and forth, whereby an ample supply or" lubricant is maintained advantageously available lat all times forthe roll 2S (see Fig. 4)'. The'depending part of fin 58 is divided into two points 64 and 65 which extend into adjacency to the respective paths of the rolls 27 and 3l. idjacentdownwardly d'iverging edges of the iin 58, merge beneath the duct 56 so that lubricant-,passing from the latter will divide and collect on both of Saidpointsil and rlhe looper carrier 29 supporting stud 30 and roll 31, (seeFig. 3) is notched as at 65 to receive lubricant therein Yfrom 'the lin point 65 as said point is passed bythe carrier in the reciprocatory movement olf the latter. 'ln a similar way the arm 22 ol? looper carrier 24`is notched as at 67 to receive lubricant from the point 64.

In thettront face of the frame cap 9 and communicating with the reservoir is a tapped hole, 68 countersunk to receive the head 69 of a threaded bushing 70. Said bushing has a sight opening 71 and is countersunk from its inner end to receive the transparent disk 72, washer 7 3 and soacing lubricant. Ports through which lubricant may be introduced into the reservoir are designated by 76.

While specific terms have been employed in the foregoing description of the particular embodiment of the invention disclosed in the drawings it will be understood that the invention is not limited thereto; as other forms of its embodiment may be produced within the scope of the appended claims.

lllhat I claim is l. In a sewing machine including looper mechanism, and in combination therewith a lubricator for said looper mechanism comprising a lubricant reservoir located above said looper mechanism, fins having depending points adjacent respectively' to paths traversed by certain parts of the looper mechanism and ducts leading from said lubricant reservoir to said fins.

2. In a sewing machine including looper mechanism, and in combination a support for said looper mechanism comprising a frame cap having a lubricant reservoir, fins secured to said frame cap having depending points adjacent respectively to paths traversed by certain parts of the looper mechanism and ducts leading from said lubricant reservoir to said fins.

3. In a sewing machine the combination with a frame cap having a lubricant reservoir, of looper carriers movably mounted on said frame cap, devices on said carriers whereby they may be actuated, fins secured to the frame cap and having depending points adjacent respectively to paths trav,- ersed by said devices on the looper carriers and ducts leading from the lubricant reservoir to said fins.

4. In a sewing machine in combination, a looper, a support,a carrier for the looper movable on said support, means including a roller supported by the carrier whereby the latter may be actuated to move in a pre-V determined path, means extending adjacent to said path for conveying lubricant to a point therein, and means on the carrier for directing the lubricant from said point into communication with bearing surfaces of the roller` 5. In a sewing machine in combination, a looper, a support, a carrier for the looper movable on said support, means including a voir, a conveyer or fin connected by a duct with the reservoir and adapted to transfer lubricant from a depending partthereof to the projection on the `carrier at a point approached by the latter and means for regulating the How lof lubricant through said duct. Y

@In a sewing machine in combination, a pair of loopers, a support, a movable member carried by the support, a carrier for one of the loopers movably mounted on 'themovable member, a carrier for the other looper movably mounted on the support means including projections on the respective carriers whereby the latter may be actuated, a lubricant reservoir and a conveyer or fin having parts depending to points approached respectively by the projections of the carriers and adapted to transfer thereto lubricant delivered through a duct connecting said conveyer with the reservoir.

8. In a sewing machine in combination, a pair of loopers, a support, a movable member carried by the support, a carrier for one of the loopers movably mounted on the movable member, a carrier for the other looper movablyl mounted on the support, a guidebar for the first mentioned carrier secured to the support, means including projections on the respective carriers whereby the latter may be actuated, a lubricant reservoir, and a conveyer or fin secured to the guide bar and connected with the reservoir by a duct partially in the guide bar, said conveyer having parts depending to points` approached respectively by the projections on the carriers and adapted to transfer lubricant thereto.

9. In a sewing machine in combination, a looper, a support, a carrier for the looper movably mounted on the support, a movable element for actuating the looper carrier, a connection between said movable element and the carrier whereby'the latter may be actuated, a deflector on the carrier flanked on opposite sides by pockets communicating with said connection and a conveyer for delivering lubricant to a point in a path 'traversed by said deflector.

l0. In a sewing machine in combination, a looper, a support, a carrier for the looper movable on said support, a cam cylinder provided with a groove, a device associated with the carrier adapted to engage said groove and to be actuated thereby, a lubricant reservoir, and a conveyer or iin connected by ducts' to said reservoir, said conveyers depending 'to a point approached by the device associated with the carrier whereby said device will be supplied with cam cylinders, separate devices associated carrier ,whereby said devices Will be Sup- With the carrier and engageable by respeepliedv with lubricant.

tive 'ioeveskkof the two cam cylinders, a v y, liibriant reservoir, and conveyers or fins JOSEPH MERROX' connected vby ducts vto thewreservoir, said conveyers depending` yto pointsepproached by respective devices associated With the Witnesses:

F. W. SPELLMAN, F. ANDERSON.

Copiee of this patent may be obtained. for five cents each, by addreszsng the Commissioner of Patents Washington, D. C. 

